<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    h1{
        color: red;
        color: #ff0000;
        color: #f00;
        color: rgb(255,0,0);
        color: rgba(255,0,0,0.2);
    }
    #d1{
      width: 200px;
      height: 200px;
      background-color: purple;
      /*设置背景图片*/
      background-image:url("../b.jpg") ;
      /*设置背景图片尺寸:宽度 高度*/
      background-size: 100px 100px;
      /*设置禁止重复*/
      background-repeat: no-repeat;
      /*设置背景颜色图片位置:横向百分比  纵向百分比*/
      background-position: 50% 50%;
    }

    #d2{
      width:611px;
      height:376px;
      background-color: #e8e8e8;
      background-image: url("http://doc.canglaoshi.org/tstore_v1/images/itemCat/study_computer_img1.png");
      background-size: 318px 319px;
      background-repeat: no-repeat;
      background-position: 90% 90%;
    }

    #d3{
      width:375px;
      height:376px;
      background-color: #e8e8e8;
      background-image: url("http://doc.canglaoshi.org/tstore_v1/images/itemCat/study_computer_img2.png");
      background-size: 292px 232px;
      background-repeat: no-repeat;
      background-position: 90% 70%;

    }
  </style>
</head>
<body>
<div id="d1"></div>
<div id="d2"></div>
<div id="d3"></div>
<h1>颜色测试</h1>
</body>
</html>